Screaming at a man, “Why are you, a man, in the woman’s bathroom? Who do you think you are? Why are you endangering me and any little girls in here?” might be a good start.
We’re headed in the same direction as the UK. If the girl screamed those words in the UK, the man would have successfully had her arrested for making him feel uncomfortable while doing nothing illegal.
See the insanity? The innocent are guilty, the guilty are innocent. Who is the author of such evil? We know!
Ending with “you freaking pervert, get out!”